Use the correct check for number of arguments
Use the correct check for number of arguments

Summary: || would be always true, && does the check I actually wanted.

Reviewers: jrtom

Reviewed By: jrtom

Subscribers: #core_team

Differential Revision: https://phabricator-dot-kythe-repo.appspot.com/D2179

benjyw/kythe,benjyw/kythe,kythe/kythe,bzz/kythe,bzz/kythe,kythe/kythe,kythe/kythe,bzz/kythe,bzz/kythe,benjyw/kythe,kythe/kythe,kythe/kythe,kythe/kythe,kythe/kythe,benjyw/kythe,bzz/kythe,benjyw/kythe,benjyw/kythe,kythe/kythe,bzz/kythe,benjyw/kythe,bzz/kythe,benjyw/kythe,bzz/kythe,kythe/kythe,benjyw/kythe,bzz/kythe,bzz/kythe,benjyw/kythe,kythe/kythe,bzz/kythe,bzz/kythe,kythe/kythe,benjyw/kythe,benjyw/kythe